Tickle Text is a fast, lightweight text editor written in Tcl.Tk, by tonytraductor and released under the terms of GPL v. 2 or later.
http://www.linguasos.org/tcltext.html
Tickle Text supports editing of a wide variety of text files or scripts, including .txt, .py, .tcl, .css, .html, .c, .sh, .pl, LaTeX, etc.
TickleText is "themeable", includes an integrated dictionary and a calendar. It can toggle line numbers, toggle word wrap, can insert a date, count your words, goto line #, insert special characters, open an xterm or a wish terminal, open multiple windows for editing multiple documents, open a browser, export to PDF, both from any text file, AND from .tex (LaTeX) files, export LaTeX to HTML, and, TickleText even has a LaTeX document template wizard, and another template dialog for writing tcl scripts.
I could not have built this groOVy editor without this wiki and the gracious assistance of various tclers on #tcl @ freenode.
Tickle Text is a testament to the awesome power, yet ease of learning and use of Tcl/Tk, since, I started learning to hack Tcl, as my very first programming language (other than simple bash scripts) in January of 2008, and, at the time of this posting, it is yet the beginning of April of the same year.
If I keep hanging out on this wiki and #tcl, pretty soon I might become a real hacker! And I'll hack my code with Tickle Text, of course.
TODO for Tickle Text:
* Add syntax highlighting. (that will be a big job.)
* create config file and proc to save user's color theme, browser preference, perhaps allow config of terminal preference (say the user like Konsole or Sakura or something), etc. (write a script to set variables, source the script on load?)